Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
hanh lam » thanh lap, hanh kem, hanh va
ban hanh » ban hang
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang ((x hoi) OR (o hoi)). hieu va cac xuc ban hanh lam ((khoe tre) OR (chay tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang ((x hoi) OR (o hoi)). hieu va cac xuc ban hanh lam ((khoe tre) or (chay tren))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang ((x hoi) OR (o hoi)). hieu va cac xuc ban hanh lam ((khoe tre) or (chay tren))*.